Currency Conversion Fee Calculator
When you exchange currency, providers earn revenue through two mechanisms: a percentage-based spread added to the mid-market rate and a fixed transaction fee. Understanding both costs together gives you the true cost of your conversion. This calculator takes the amount you are converting, the FX spread charged by your provider as a percentage of the amount, and any fixed fee, then shows the total cost in dollars and as an effective percentage. Use this to compare banks, credit unions, and specialist money transfer services before sending money overseas.
Currency conversion fee formula
Spread cost = amount x (spread% / 100)
Total cost = spread cost + fixed fee
Effective cost% = total cost / amount x 100
Net received = amount - total cost
The spread is applied to the full amount being converted, not just the fee portion. A 2.5% spread on $1,000 costs $25 regardless of the fixed fee.
Comparing providers
- Always obtain the mid-market rate from the Federal Reserve or a neutral source before comparing quoted rates.
- An advertised zero-fee transfer may still carry a 2 to 4 percent spread, costing more than a $5 fee with a 0.5 percent spread on large amounts.
- For transfers above $5,000, the spread cost dominates; for small amounts, the fixed fee matters more.
- Some providers offer locked-in rates for future transfers, which can protect against currency movements.
Frequently asked questions
What is an FX spread?
An FX spread is the difference between the interbank (mid-market) exchange rate and the rate a bank or money transfer operator actually offers you, expressed as a percentage. A 1% spread on $1,000 costs $10.
Why does the total cost include both a spread and a fixed fee?
Most providers charge a percentage-based spread on the converted amount plus a fixed transaction fee. Some providers advertise zero fixed fees but embed their profit entirely in the spread, making comparisons difficult.
How do I find the real mid-market rate?
The mid-market rate is published by financial data providers and central banks. The US Federal Reserve publishes daily foreign exchange rates at federalreserve.gov. Compare your provider's quoted rate to this benchmark.
What is a typical bank FX spread?
Retail banks typically charge 2 to 4 percent spread on foreign exchange for consumer transactions. Specialist money transfer operators often charge under 1 percent. The fixed fee varies from $0 to $25 per transfer.
How is the effective total cost percentage calculated?
Total cost percentage = (spread cost + fixed fee) / amount * 100. This lets you compare providers even when their fee structures differ.
Official sources
- Federal Reserve Foreign Exchange Rates: federalreserve.gov/releases/h10/.
- Consumer Financial Protection Bureau, Sending Money Abroad: consumerfinance.gov/send-money-internationally/.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.